Is it safe to use Electron Cash now that Electrum for BTC is compromised?
Did they update with new patch already? If not, I wouldn't use and also move your coins immediately to another place. Now that the Electrum's vulnerability is known, storing coins in an unpatched Electrum fork is not advisable.
Edit: Looks like they came up with patch. Here is link to download.
https://electroncash.org/#download After downloading, verifying and installing, create a new wallet immediately and move your coins to addresses in the new wallet from the old wallet, immediately.
That's very important! Devs should spread the work about vulnerability and ask users to update ASAP (if there is updated fork version ofc)!